<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <el-row class="addButton">
                <el-col>
                    <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
                </el-col>
            </el-row>
            <tree-table :data="cateList" :columns="columns" :selection-type="false" :expand-type="false" show-index index-text="#" border :show-row-hover="false">
                <template slot="isok" slot-scope="scope">
                    <i class="el-icon-success" v-if="scope.row.cat_deleted === false"
                    style="color:lightgreen;"></i>
                    <i class="el-icon-error" v-else
                    style="color:red;"></i>
                </template>
                <template slot="order" slot-scope="scope">
                    <el-tag size="mini"
                    v-if="scope.row.cat_level === 0">一级</el-tag>
                    <el-tag size="mini" type="success"
                    v-else-if="scope.row.cat_level === 1">二级</el-tag>
                    <el-tag size="mini" type="warning" v-else>三级</el-tag>
                </template>
                <template slot="opt" slot-scope="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditCate(scope.row.cat_id)">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete" @click="deleteCate(scope.row.cat_id)">删除</el-button>
                </template>
            </tree-table>
            <!-- 分页区域 -->
            <el-pagination
            @size-change="handleSizeChange"
            @current-change="handleCurrentChange"
            :current-page="queryInfo.pagenum"
            :page-sizes="[3,5,8,10]"
            :page-size="queryInfo.pagesize"
            layout="total, sizes, prev, pager, next, jumper"
            :total="total">
            </el-pagination>
            </el-card>
            <!-- 添加分类对话框 -->
            <el-dialog
            title="添加分类"
            :visible.sync="addCateDialogVisible"
            width="50%" @close="addCateDialogClose">
            <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
                <el-form-item label="分类名称" prop="cat_name">
                    <el-input v-model="addCateForm.cat_name"></el-input>
                </el-form-item>
                <el-form-item label="父级分类">
                    <el-cascader
                    v-model="selecteKeys"
                    :options="parentCateList"
                    :props="cascaderConfigObj"
                    @change="parentCateChanged"
                    clearable></el-cascader>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addCateDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addCate">确 定</el-button>
            </span>
            </el-dialog>
            <!-- 编辑分类对话框 -->
            <el-dialog
            title="修改分类"
            :visible.sync="editCateDialogVisible"
            width="50%">
            <el-form :model="editCateForm" :rules="addCateFormRules" ref="editCateFormRef" label-width="100px">
                <el-form-item label="分类名称" prop="cat_name">
                    <el-input v-model="editCateForm.cat_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editCateDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="submitEditCate">确 定</el-button>
            </span>
            </el-dialog>
    </div>
</template>
<script>
export default {
  data () {
    return {
      // 将要获取的信息
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      // 获取的商品列表
      cateList: [],
      //   总数据条数
      total: 0,
      //   控制添加分类对话框显示
      addCateDialogVisible: false,
      // 树形表格数据绑定
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      //   添加分类表单的数据对象
      addCateForm: {
        cat_name: '',
        cat_level: 0,
        cat_pid: 0
      },
      // 表单校验规则
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      //   获取到的父级分类数据列表
      parentCateList: [],
      //   级联选择器配置对象
      cascaderConfigObj: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        checkStrictly: true
      },
      //   选中的父级分类的id数组
      selecteKeys: [],
      // 编辑分类对话框
      editCateDialogVisible: false,
      // 修改分类表单
      editCateForm: {}

    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    //   获取商品列表
    async getCateList () {
      const { data: res } = await this.$http.get('categories', { params: this.queryInfo })
      if (res.meta.status !== 200) return this.$message.error('获取数据失败')
      this.cateList = res.data.result
      this.total = res.data.total
    },
    // 单页数据修改
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    // 监听pagenum修改
    handleCurrentChange (newNum) {
      this.queryInfo.pagenum = newNum
      this.getCateList()
    },
    // 显示添加对象对话框
    showAddCateDialog () {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    // 获取父级分类的数据列表
    async getParentCateList () {
      const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
      if (res.meta.status !== 200) return this.$message.error('获取父级数据列表失败')
      this.parentCateList = res.data
    },
    // 选择器发生变化
    parentCateChanged () {
      if (this.selecteKeys.length > 0) {
        this.addCateForm.cat_pid = this.selecteKeys[this.selecteKeys.length - 1]
        this.addCateForm.cat_level = this.selecteKeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    //   提交按钮
    addCate () {
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) return this.$message.error('添加分类失败')
        this.$message.success('添加成功')
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    // 监听添加分类对话框关闭
    addCateDialogClose () {
      this.$refs.addCateFormRef.resetFields()
      this.selecteKeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    },
    // 修改分类对话框
    async showEditCate (id) {
      const { data: res } = await this.$http.get('categories/' + id)
      if (res.meta.status !== 200) return this.$message.error('获取数据失败')
      this.editCateForm = res.data
      this.editCateDialogVisible = true
    },
    // 修改分类数据提交
    async submitEditCate () {
      const { data: res } = await this.$http.put('categories/' + this.editCateForm.cat_id, {
        cat_name: this.editCateForm.cat_name
      })
      if (res.meta.status !== 200) return this.$message.error('修改失败')
      this.getCateList()
      this.$message.success('修改成功')
      this.editCateDialogVisible = false
    },
    // 删除分类
    async deleteCate (id) {
      const confirmRes = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmRes !== 'confirm') return this.$message.info('已取消删除')
      const { data: res } = await this.$http.delete('categories/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除失败')
      this.getCateList()
      this.$message.success('删除成功')
    }
  }
}
</script>
<style lang="less" scoped>

</style>
